package collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class SortPoint {
    public static void main(String[] args) {
        List<Point> list=new ArrayList<>();
        list.add(new Point(10,20));
        list.add(new Point(20,30));
        list.add(new Point(30,40));
        System.out.println("list:"+list);
        list.sort(new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                return o1.getX()-o2.getX();
            }
        });
        list.sort((o1,o2)->o1.getX()-o2.getX());
        /*Collections.sort(list, new Comparator<Point>() {
            public int compare(Point o1, Point o2) {
                int line1=o1.getX()*o1.getX()+o1.getY()*o1.getY();
                int line2=o2.getX()*o2.getX()+o2.getY()*o2.getY();
                return line2-line1;
            }
        });
         */
        Collections.sort(list,(o1,o2)->{
            int line1=o1.getX()*o1.getX()+o1.getY()*o1.getY();
            int line2=o2.getX()*o2.getX()+o2.getY()*o2.getY();
            return line2-line1;
        });
        System.out.println(list);
    }
}
